From Nautilus file manager thumbnail to code execution via ghostscript and evince... by @taviso & @tehjh http://seclists.org/oss-sec/2018/q3/157 …pic.twitter.com/UGbUSwXcPe
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The Ubuntu AppArmor policy is ***very*** permissive. I think you mean "the simple test case you wrote doesn't work", please don't confuse matters by saying it's not vulnerable. It is vulnerable, it just needs to be exploited differently.